help with network mode

[daylate]

hey guys, can anyone help me with this issue..I have tp2 (sprint) on metropcs running energy rom..everything works fine but when i switch to gsm mode (tmobile) which works also,then back to cdma (metropcs) I loose all my settings. It puts the default (sprint) back in causing my internet and pic mail not to work. Is there a way to edit the registry to prevent this from happening...any help would be appreicated.